{"title":"Wormhole configuration with viable equation of state in f(Q) gravity","authors":"Sweeti Kiroriwal , Jitendra Kumar , S.K. Maurya , Saibal Ray","doi":"10.1016/j.dark.2024.101559","DOIUrl":null,"url":null,"abstract":"<div><p>In this paper, we present asymptotically flat wormhole geometries in the context of <span><math><mrow><mstyle><mi>f</mi></mstyle><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> gravity theory, where <span><math><mi>Q</mi></math></span> is non-metricity scalar, by assuming a particular equation of state (EOS) <span><math><mrow><mi>ρ</mi><mo>=</mo><mi>Ψ</mi><mrow><mo>[</mo><msub><mrow><mstyle><mi>P</mi></mstyle></mrow><mrow><mstyle><mi>r</mi></mstyle></mrow></msub><mo>+</mo><mrow><mo>(</mo><mi>n</mi><mo>−</mo><mn>2</mn><mo>)</mo></mrow><msub><mrow><mstyle><mi>P</mi></mstyle></mrow><mrow><mo>⊥</mo></mrow></msub><mo>]</mo></mrow></mrow></math></span>, where <span><math><mi>Ψ</mi></math></span> denotes a EOS parameter and <span><math><mi>n</mi></math></span> is any integer. In this regard, we have established two different wormhole models by solving the EOS assuming the particular values for the parameter <span><math><mi>n</mi></math></span>, say for <span><math><mrow><mi>n</mi><mo>=</mo><mn>1</mn></mrow></math></span> and <span><math><mrow><mi>n</mi><mo>=</mo><mn>3</mn></mrow></math></span>, and investigate the effect of EOS parameter on the wormhole geometries. The conducted analysis shows that the energy density is consistently positive for the wormhole models and the null energy condition is violated which indicates the presence of exotic matter. Furthermore, we have also developed a third model by assuming a specific shape function that satisfies all the necessary conditions of wormholes. Moreover, these solutions are found to be stable utilizing an equilibrium condition. Additionally, we go over the phenomenon of the complexity factor for all wormhole models and conclude that, for larger values of the radial coordinate, it approaches zero which shows the isotropic behavior of pressure and homogeneity of energy density.</p></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"46 ","pages":"Article 101559"},"PeriodicalIF":5.0000,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics of the Dark Universe","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2212686424001419","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, we present asymptotically flat wormhole geometries in the context of gravity theory, where is non-metricity scalar, by assuming a particular equation of state (EOS) , where denotes a EOS parameter and is any integer. In this regard, we have established two different wormhole models by solving the EOS assuming the particular values for the parameter , say for and , and investigate the effect of EOS parameter on the wormhole geometries. The conducted analysis shows that the energy density is consistently positive for the wormhole models and the null energy condition is violated which indicates the presence of exotic matter. Furthermore, we have also developed a third model by assuming a specific shape function that satisfies all the necessary conditions of wormholes. Moreover, these solutions are found to be stable utilizing an equilibrium condition. Additionally, we go over the phenomenon of the complexity factor for all wormhole models and conclude that, for larger values of the radial coordinate, it approaches zero which shows the isotropic behavior of pressure and homogeneity of energy density.
在本文中,我们通过假设一个特定的状态方程(EOS)ρ=Ψ[Pr+(n-2)P⊥],其中Ψ表示一个EOS参数,n为任意整数,在f(Q)引力理论(Q为非度量标量)的背景下提出了渐近平坦的虫洞几何。为此,我们假设参数 n 的特定值(如 n=1 和 n=3),通过求解 EOS 建立了两种不同的虫洞模型,并研究了 EOS 参数对虫洞几何形状的影响。分析结果表明,虫洞模型的能量密度始终为正,并且违反了空能量条件,这表明存在奇异物质。此外,我们还通过假定一个特定的形状函数建立了第三个模型,它满足虫洞的所有必要条件。此外,我们还利用平衡条件发现这些解是稳定的。此外,我们还研究了所有虫洞模型的复杂系数现象,并得出结论:当径向坐标值较大时,复杂系数趋近于零,这表明了压力的各向同性行为和能量密度的均匀性。
期刊介绍:
Physics of the Dark Universe is an innovative online-only journal that offers rapid publication of peer-reviewed, original research articles considered of high scientific impact.
The journal is focused on the understanding of Dark Matter, Dark Energy, Early Universe, gravitational waves and neutrinos, covering all theoretical, experimental and phenomenological aspects.